On 08/15/2011 01:27 AM, Ernest Christley wrote:

I removed the 4 screws, wrapped up the base in some shop rags, leaving just the top of the post exposed, then used a cut-off wheel in my Dremel to make a deep scratch in the steel ball's seat on the top of the post.

I put it all back together, tested that the pumps made 60psi, regulated it back down to 50, then watched the pressure bleed off in about 5 seconds after I switched the pumps off.  Then I went in the house to recover from the gas fumes.

This method doesn't add any weight, connections or extra hose, but is 100% effective at relieving the fuel line pressure on shutdown.

BTW, what made me decide to do this was some reading I was doing on the forums.  The chamber in the base that holds the pressurized fuel also has an 1/8"NPT outlet meant for a fuel pressure gauge.  I was considering using this for the pressure bleed connection.  Some of the hot-rodders were complaining about how the Aeromotive regulators weren't holding pressure after the fuel pumps were shut down.  They traced their woes to poor machining of the steel ball's seat on the base's post.

Their spending time and energy to clean up the machining to make a perfect seal, so I went out and destroyed some beautiful machine work to make a terrible seal.  Go figure.